#index6 {
  background: rgba(31, 31, 31, 0.5);
}
.bg_size {
  background-size: 100% 100%;
  background-repeat: no-repeat;
}
#index6 .main {
  width: 5.63rem;
  height: 7.54rem;
  background: url(../img/index4/祝福卡.png);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  position: absolute;
  left: 13%;
  top: 21%;
  animation: 3s ease;
}
@keyframes zhufu {
  0% {
    transform: scale(1);
  }
  25% {
    transform: scale(1.2);
  }
  50% {
    transform: scale(1);
  }
  75% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}
#index6 .btn {
  width: 4.35rem;
  height: 2.02rem;
  background: url(../img/index4/返回首页.png);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  position: absolute;
  left: -100%;
  bottom: 10%;
  transition: left 2s;
}
